Mythos 5 ($10/$50) is not in LiteLLM or the models.dev/OpenRouter gap-fill
yet (Fable is), so dropping the manual patch left it priced at $0. Add it to
MANUAL_ENTRIES + the snapshot and map the "Mythos 5" display name.
Keep model pricing automatic instead of hand-coding new models. The bundler
now layers three sources in priority order: LiteLLM (broad list prices),
hand-curated MANUAL_ENTRIES overrides, then a separate last-resort fallback
file gap-filled from models.dev first-party makers (official direct prices)
and OpenRouter (resale backstop). New models such as MiniMax-M3 ($0.6/$2.4)
now price correctly with no per-model code.
The fallback is written to its own pricing-fallback.json and consulted only
case-insensitively as the final step in getModelCosts, so a reseller variant
name can never shadow a canonical or aliased match.
Fixes surfaced while building and verifying this:
- Alias precedence: LiteLLM ships snowflake/claude-4-opus ($5), which the
bundler strips to a bare claude-4-opus key that shadowed the curated alias
to claude-opus-4 ($15 official). An explicit alias for a bare name now wins
over a coincidental stripped reseller key; the prefixed gateway price is
still returned for the fully-qualified id.
- Zero-stub guard: LiteLLM [0,0] price stubs (e.g. GigaChat-2-Max) are
excluded from the case-insensitive index so a case-mismatched query stays
null and keeps firing the unknown-model warning instead of silently
reporting $0.
- Negative-sentinel guard: OpenRouter returns -1 for variable/BYOK-priced
models. The bundler now rejects any non-positive rate pair (and strips the
sentinel from cache fields) so a negative per-token cost can never ship and
subtract from spend totals.
Bundler hardening: bareKey strips @pin and date suffixes to match the runtime
canonical form, seen-set dedupes on both full and bare key shapes, and it logs
MANUAL_ENTRIES now covered upstream plus models.dev allowlist drift. Extracted
buildCosts so the cache-cost heuristics live in one place. Added a data-hygiene
test that fails CI if a rebundle reintroduces negative, free, or unreachable
fallback entries.
New Claude releases no longer need a hand-maintained SHORT_NAMES entry or
FAST_MULTIPLIERS row. Display names are derived from the claude-<family>-<major>-<minor>
id, and the fast-mode multiplier rides along as a 5th element in the LiteLLM
snapshot tuple (provider_specific_entry.fast). Fixes#420: claude-opus-4-8 gets
its own line and correct pricing instead of falling into the Opus 4 bucket.
